Effect of boron particle size on microstructure and superconducting properties of in-situ Cu addition MgB2 multifilamentary wire

Y. Hishinuma, A. Kikuchi, Y. Shimada, S. Hata, T. Takeuchi, S. Yamada, A. Sagara

研究成果: Conference article査読

3 被引用数 (Scopus)

抄録

In previous studies, the secondary (impurity and non-reactive) phase and voids were observed in MgB2 matrix after the heat treatment, and then these are the lowering factors of critical current density (Jc) property. In order to improve Jc property by microstructure control of MgB2 matrix, the fine elemental boron powder as the raw material was carried out using the high-speed vibrated milling with tungsten carbide (WC) jar. The average particle size of metal boron powder was decreased from 1.14 μm to 0.20 μm by the high-speed vibrated milling. The various fine particle boron powders as the function of milling time were also prepared, and in-situ Cu addition MgB2 multifilamentary wires using these fine boron powders were fabricated. Critical transition temperature (Tc) value of Cu addition MgB2 wire using fine boron powder obtained to about 37 K. No change of the Tc property by the different particle sized boron powders was confirmed. In this paper, the comparisons of microstructure and superconducting properties between the different boron particle sizes were investigated.

本文言語English
論文番号022009
ジャーナルJournal of Physics: Conference Series
507
PART 2
DOI
出版ステータスPublished - 2014
イベント11th European Conference on Applied Superconductivity, EUCAS 2013 - Genoa, Italy
継続期間: 2013 9 152013 9 19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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